JavaScript中常用的事件_市场资讯

JavaScript中常用的事件

admin

2024-02-03 18:48:00

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事件：

相当于监听器之类的：一种能被JavaScript侦测到，网页中每个元素都可以产生某些可以触发Javascript函数的事件；

一、鼠标单击事件：

属性：onclick 当用户点击某个事物的句柄

属性：oncontextmenu 当用户点击鼠标右键打开上下文菜单时触发

属性：ondblclicl 当用户双击某个对象调用事件句柄

属性： onmousedown 鼠标按钮按下

属性： onmouseleave 当鼠标指针移除元素时触发

属性： onmousout 鼠标从元素上移开

属性：onmousemove 鼠标被移动

属性： onmouseup 鼠标按键被送开

这是一个惊喜和子


开盖有惊喜！

二、键盘事件：

属性：onkeydown 某个键盘被按下

属性：onkeypress莫个键盘按键被按下并松开

属性：onkeyup摸个键盘被松开

三、表单事件：

属性 onblur 元素失去焦点时触发
属性 onchange 该事件在表单元素的内容改变时触发( , , )<br /> 属性 onfocus 元素获取焦点时触发<br /> 属性 onfocusin 元素即将获取焦点时触发<br /> 属性 onfocusout 元素即将失去焦点时触发<br /> 属性 oninput 元素获取用户输入时触发<br /> 属性 onreset 表单重置时触发<br /> 属性 onsearch 用户向搜索域输入文本时触发 ( <input="search">)<br /> 属性 onselect 用户选取文本时触发 ( <input> 和 <textarea>)<br /> 属性 onsubmit 表单提交时触发</p> <pre><code class="language-java"><!DOCTYPE html> <html> <head><meta charset='utf-8'><meta http-equiv='X-UA-Compatible' content='IE=edge'><title>Page Title</title><meta name='viewport' content='width=device-width, initial-scale=1'></head> <style>*{margin: 0;padding: 0;}div.login{width: 40%;height: 400px;background-color: aqua;margin: 50px auto;padding-top: 20px;background-image: url(../img/宇航员.gif);color: white;border-radius: 10px;}div.login h1{text-align: center;}form{width: 80%;height: 80%;margin: 30px auto;}div.userinput{width: 80%;height: 20%;margin: 40px auto;}div.userinput label{font-size: 20px;}div.userinput input{width: 70%;height:35px;margin-left: 20px;border-radius: 10px;outline: none;}div.buttonStyle{width: 80%;height: 20%;margin: auto;}input[type="submit"]{width: 100%;height: 50px;border-radius: 10px;background-color: gainsboro;border: none;}div#model{width: 40%;height: 420px;background-color: rgba(0, 0, 0, 0.5);border-radius: 10px;position: absolute;top: 0;left: 460px;}span#modelText{color: red;font-size: 30px;text-align: center;line-height: 420px;font-weight: 600;}span#hide{color: yellow;font-size: 30px;position: absolute;top: 10px;right: 10px;} </style> <body><div style="position: relative;"><div class="login"><h1>霍格沃兹入口</h1><form action="https://www.baidu.com" method="get" onsubmit="return validity()"><div class="userinput"><label for="username">用户账号:</label><input type="text" name="username" id="username"></div><div class="userinput"><label for="userpwd">登录密码:</label><input type="password" name="userpwd" id="userpwd"></div><div class="buttonStyle"><input type="submit"></div></form></div><div id="model"><span id="modelText"></span><span id="hide" onclick="hide()">X</span></div></div> </body> <script>// 进入页面时，获取模态框节点并隐藏var model = document.getElementById("model");model.style = "display:none";// 获取模态框中文子节点var modelText = document.getElementById("modelText");function validity(){// 获取账号节点var username = document.getElementById("username");// 获取密码节点var userpwd = document.getElementById("userpwd");// 姓名正则var nameReg = /^([\u4e00-\u9fa5]{1,20}|[a-zA-Z\.\s]{1,20})$/;// 密码正则var pwdReg = /^[0-9a-zA-Z]{6,12}$/;// 验证账号是否为空if(username.value.length == 0){modelBlock();modelText.innerHTML = "账号不能为空";return false;}// 验证账号格式if(!nameReg.test(username.value)){modelBlock();modelText.innerHTML = "账号格式有误";return false;}// 验证密码是否为空if(userpwd.value.length == 0){modelBlock();modelText.innerHTML = "密码不能为空";return false;}// 验证密码格式if(!pwdReg.test(userpwd.value)){modelBlock();modelText.innerHTML = "密码格式有误";return false;}}function modelBlock(){// 显示模态框model.style = "display:block";}function hide(){// 关闭模态框model.style = "display:none";} 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